I get around 800+ kilobytes on a good day, I'm in an HPSA+ area as well, but I rarely get the 3.5G symbol.

On lower days I get 400 to 600 kilobytes. I find KB/s and MB/s easier to represent data than Kbits and Mbits.

At 2 AM, I can download a 5 MB mp3 in about 16 seconds.